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Contracts and Agreements (Tables) | 3 Months Ended
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Mar. 31, 2015
Contractors [Abstract] |
Brokerage Commissions | USL also incurs commissions to brokers for the purchase and sale of Oil Futures Contracts, Other Oil-Related Investments or short-term obligations of the United States of two years or less (“Treasuries”).
|  | For the three months ended March 31, 2015 |  |  | For the three months ended March 31, 2014 |
Total commissions accrued to brokers |  | $ | 6,437 |  |  | $ | 1,400 |
Total commissions as an annualized percentage of average net assets |  |  | 0.04 | % |  |  | 0.01 | %
Commissions accrued as a result of rebalancing |  | $ | 4,323 |  |  | $ | 999 |
Percentage of commissions accrued as a result of rebalancing |  |  | 67.16 | % |  |  | 71.36 | %
Commissions accrued as a result of creation and redemption activity |  | $ | 2,114 |  |  | $ | 401 |
Percentage of commissions accrued as a result of creation and redemption activity |  |  | 32.84 | % |  |  | 28.64 | %

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- Definition Tabular disclosure of fees earned by the broker commission. + References No definition available. + Details
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